/Engine/Source/Runtime/Core/Public/Misc/Attribute.h
Binds an arbitrary function that will be called to generate this attribute's value on demand. After binding, the attribute will no longer have a value that can be accessed directly, and instead the bound function will always be called to generate the value.
template<class SourceType> void Bind ( [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< SourceType > InUserObject, typename FGetter::template TConstMethodPtr< SourceType > InMethodPtr )